21 November 1995 Distributed simulation approach for enabling cooperation between entities in heterarchical manufacturing systems
Author Affiliations +
Abstract
In this paper, a method for performing time-scaled distributed simulation is described for control of heterarchical manufacturing systems, where it is used as a mechanism by which highly autonomous entities in these systems can cooperate implicitly and to adapt to disturbance events in real-time. A replica of the system software, executing at a speed that is several orders of magnitude faster than real time, serves as an accurate, detailed, distributed simulation model that can be developed at low cost. Performance estimates obtained from simulations are used as feedback by entities in the system to iteratively improve global coherence. The time-scaled approach eliminates the need for explicitly synchronizing events and thereby eliminates the complexity associated with discrete event distributed simulation approaches. The method is applied in the paper to a manufacturing control system in which control laws with a continuous feedback structure are embedded in the autonomous workpiece entities and used to adjust the timing of events required to produce workpieces. The control laws ensure the stability and convergence of the system, while allowing it to be effectively controlled with minimal global information.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vittaldas V. Prabhu, Vittaldas V. Prabhu, Neil A. Duffie, Neil A. Duffie, } "Distributed simulation approach for enabling cooperation between entities in heterarchical manufacturing systems", Proc. SPIE 2596, Modeling, Simulation, and Control Technologies for Manufacturing, (21 November 1995); doi: 10.1117/12.227223; https://doi.org/10.1117/12.227223
PROCEEDINGS
9 PAGES


SHARE
RELATED CONTENT

Distributed intelligent scheduling of FMS
Proceedings of SPIE (August 27 1995)
Advanced Map For Real-Time Process Control
Proceedings of SPIE (October 18 1987)
Spaceflight optical disk recorder development
Proceedings of SPIE (January 19 1993)
Virtual machining operation: a concept and an example
Proceedings of SPIE (November 10 2004)

Back to Top